In case large or multiple documents are signed, you have to know, that arguments passed to the applet plugin have a
length restriction.
The length restriction for the Java 7 plugin is approximately 10.5 MB for the sum of all
arguments.
To work around this restriction try passing the arguments as (hidden) form fields.
For example instead of
ARGS: 'documents.0.content=...; documents.1.content=...';
Use form fields:
<form id="form"> <input type="hidden" name="documents_0_content" value="..." /> <input type="hidden" name="documents_1_content" value="..." /> </form>